Add type augments for classes so intellisense doesn't keep converting system to migrateSystemData

augments.d.ts

@@ -0,0 +1,9 @@
+interface Actor {
+	/** The system-specific data */
+	system: any;
+};
+
+interface Item {
+	/** The system-specific data */
+	system: any;
+};

jsconfig.json

@@ -0,0 +1,7 @@
+{
+	"compilerOptions": {
+		"types": [
+			"./augments.d.ts"
+		]
+	}
+}